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106 lines
3.3 KiB
C#
106 lines
3.3 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Dir.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : U.C.S.D. Pascal filesystem plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Methods to show the U.C.S.D. Pascal catalog as a directory.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Collections.Generic;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.Helpers;
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namespace Aaru.Filesystems;
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// Information from Call-A.P.P.L.E. Pascal Disk Directory Structure
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public sealed partial class PascalPlugin
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{
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#region IReadOnlyFilesystem Members
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/// <inheritdoc />
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public ErrorNumber OpenDir(string path, out IDirNode node)
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{
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node = null;
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if(!_mounted) return ErrorNumber.AccessDenied;
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if(!string.IsNullOrEmpty(path) && string.Compare(path, "/", StringComparison.OrdinalIgnoreCase) != 0)
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return ErrorNumber.NotSupported;
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List<string> contents = _fileEntries.ConvertAll(ent => StringHandlers.PascalToString(ent.Filename, _encoding));
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if(_debug)
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{
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contents.Add("$");
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contents.Add("$Boot");
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}
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contents.Sort();
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node = new PascalDirNode
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{
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Path = path,
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Contents = contents.ToArray(),
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Position = 0
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};
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return ErrorNumber.NoError;
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}
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/// <inheritdoc />
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public ErrorNumber ReadDir(IDirNode node, out string filename)
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{
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filename = null;
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if(!_mounted) return ErrorNumber.AccessDenied;
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if(node is not PascalDirNode mynode) return ErrorNumber.InvalidArgument;
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if(mynode.Position < 0) return ErrorNumber.InvalidArgument;
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if(mynode.Position >= mynode.Contents.Length) return ErrorNumber.NoError;
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filename = mynode.Contents[mynode.Position++];
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return ErrorNumber.NoError;
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}
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/// <inheritdoc />
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public ErrorNumber CloseDir(IDirNode node)
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{
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if(node is not PascalDirNode mynode) return ErrorNumber.InvalidArgument;
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mynode.Position = -1;
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mynode.Contents = null;
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return ErrorNumber.NoError;
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}
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#endregion
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} |